1. 877

    OP 877 GBAtemp Regular
    Member

    Joined:
    Mar 8, 2017
    Messages:
    160
    Country:
    United Kingdom
    So I just dumped my new Switch NAND (v3.0.2) and it comes to 29.1GB (exfat one file)
    But Winrar compresses it down to a total of 480MB!

    Is this normal guys/gals?
     
  2. Thetoto

    Thetoto GBAtemp Advanced Fan
    Member

    Joined:
    May 10, 2018
    Messages:
    529
    Country:
    France
    Yes, if you have less than 480MB in your NAND. DO you have any eshop games, update, album pictures, ... in your NAND ?
     
    Last edited by Thetoto, Jul 22, 2018
  3. 877

    OP 877 GBAtemp Regular
    Member

    Joined:
    Mar 8, 2017
    Messages:
    160
    Country:
    United Kingdom
    @Thetoto No the console is brand new on v3.0.2 only used once, will only have a save game on it as my son couldn't wait :)
    Thanks
     
  4. Lacius

    Lacius GBAtemp Legend
    Member

    Joined:
    May 11, 2008
    Messages:
    12,119
    Country:
    United States
    In addition to your rawnand.bin, make sure you also backup your BOOT0 and BOOT1. They're also small.
     
  5. 877

    OP 877 GBAtemp Regular
    Member

    Joined:
    Mar 8, 2017
    Messages:
    160
    Country:
    United Kingdom
    @Lacius Yes I have done that too thanks
     
    Lacius likes this.
  6. VuuI

    VuuI GBAtemp Regular
    Member

    Joined:
    Dec 28, 2014
    Messages:
    100
    Country:
    Belgium
    What do these do exactly? I was planning to restore my nand in the future to before I used SXOS, but don't have these, only have the 29.1GB rawnand.
     
  7. Lacius

    Lacius GBAtemp Legend
    Member

    Joined:
    May 11, 2008
    Messages:
    12,119
    Country:
    United States
    http://switchbrew.org/index.php?title=Flash_Filesystem

    As far as the end user is concerned, it's good to have these backed up for the following reasons:
    • They're needed if you're restoring a NAND backup from a different system version than the one you're currently on (e.g. downgrading).
    • In case you corrupt BOOT0/1 and can't restore them (e.g. AutoRCM)
     
    VuuI likes this.
  8. The Real Jdbye

    The Real Jdbye Always Remember 30/07/08
    Member

    Joined:
    Mar 17, 2010
    Messages:
    18,995
    Country:
    Norway
    That's the bootloader, more or less.
     
    VuuI likes this.
  9. VuuI

    VuuI GBAtemp Regular
    Member

    Joined:
    Dec 28, 2014
    Messages:
    100
    Country:
    Belgium
    Alright, sounds like I can just make those backups right now to use with my previous backup then, since i haven't updated my FW or anything and it doesn't sound like SXOS affects those
     
    Lacius likes this.
  10. DinohScene

    DinohScene Feed Dino to the Sharks
    Moderator

    Joined:
    Oct 11, 2011
    Messages:
    20,113
    Country:
    Antarctica
    it's completely normal.

    All the 0's in the data just get stripped during the compressing.
     
    Lacius and 877 like this.
  11. atschatner

    atschatner Member
    Newcomer

    Joined:
    Jul 16, 2018
    Messages:
    24
    Country:
    Norway
    Mine also compressed to a measly .5gigs, compression algorithms are a real gift.
     
  12. TamarindoJuice

    TamarindoJuice GBAtemp Regular
    Member

    Joined:
    Jan 30, 2016
    Messages:
    255
    Country:
    Brazil
    Backup BOOT0 and BOOT1 with AutoRCM enabled (boot data corrupted) can lead to any problem in the future in case i need to use my backup to restore my potentially soft bricked Switch?
     
  13. nightweb

    nightweb GBAtemp Regular
    Member

    Joined:
    Sep 16, 2009
    Messages:
    148
    Country:
    Ireland
    I was wondering if anyone could advise me, I made two backup's of my NAND (and Boot0/1) however both times when I compressed them they come to nearly 22.7GB and the 7-zip file when compressed is 22GB. anyone suggest how I can compress it down to what everyone else seems to be able to compress it to?
     
  14. atschatner

    atschatner Member
    Newcomer

    Joined:
    Jul 16, 2018
    Messages:
    24
    Country:
    Norway
    Try WinRar and see if the archive is smaller.
     
  15. Engezerstorung

    Engezerstorung GBAtemp Regular
    Member

    Joined:
    Nov 9, 2011
    Messages:
    179
    Country:
    France
    guys, the compressed size of your nand backup depend on what is actually on your switch, so all raw backup will be max size available on your nand (29.1GB), but if you have nothing on it if will just remove all the "empty space" in it, to leave only the really used space, when you compress it

    so if your switch is full with stuff, your compressed nand will be big anyway
    there is no "magic compressing algorythme"
     
    atschatner likes this.
  16. nightweb

    nightweb GBAtemp Regular
    Member

    Joined:
    Sep 16, 2009
    Messages:
    148
    Country:
    Ireland
    sorry My post bit unclear, overheating here at the moment, WinRAR is 22.7GB 7-Zip is 22.0GB

    This is where I'm totally confused, my NAND is empty, well there's a few files that Mario Odessdy installed but it says that is only few MB in size, other than that everything is on my SD card :(
     
  17. Albytrozz

    Albytrozz GBAtemp Regular
    Member

    Joined:
    Jun 10, 2018
    Messages:
    265
    Country:
    United States
    To explain this more simply, the archiving app just sees all of those useless '0's in the full NAND backups and skips them and keeps any actual info left. This is why compression is so useful on ROM dumps or even some of your untrimmed XCIs, you don't need to be storing blank space if you can help it.

    It's also why the size that people end up with will vary big time based on how much free space was left empty on the NAND for the archiving app to 'skip over'...
     
  18. linuxares

    linuxares I'm not a generous god!
    Moderator

    Joined:
    Aug 5, 2007
    Messages:
    7,482
    Country:
    Sweden
    Yes it's normal. The rest if your NAND is just filled with empty preoccupid space. So Winrar compresses it. Also if you want smaller, go with 7zip and LZMA2 compression.
     
    Albytrozz likes this.
  19. Drakia

    Drakia GBAtemp Advanced Maniac
    Member

    Joined:
    Mar 15, 2008
    Messages:
    1,644
    Country:
    Canada
    If you had previously installed things, there's a good chance the Switch isn't going to set the NAND back to 0's when it's deleted (Waste of a write cycle), it's just going to flag that area as free. You most likely have had up to 22GB in use throughout the NAND in the past.
     
    LiamMCW likes this.
  20. nightweb

    nightweb GBAtemp Regular
    Member

    Joined:
    Sep 16, 2009
    Messages:
    148
    Country:
    Ireland
    Ah ok, that might explain it, when I had first got my sd I downloaded my games that must have been what caused the space to be "used", would there be a way to free or "zero-out" on the switch side? I know may seem like waste of a write cycle but the extra space I could save on the backup I could store my sd too
     
Draft saved Draft deleted
Loading...

Hide similar threads Similar threads with keywords - compresses, (WinRar), backup